My portfolio uses the <a> tags combined with <span> tags to operate. Example:
Code:
<a class="thumbnail" href="#thumb"><img src="../images/portfolio/brochures/brochure_thumbs/briarwood_thumb.gif" alt="Briarwood Apartments brochure thumbnail" width="38" height="72" border="0"/><span><img src="../images/portfolio/brochures/brochures_over/briarwood.gif" alt="Briarwood Apartments brochure" width="404" height="154"/></span></a>
as one hovers over the thumbnail, a large image is revealed. But since they are not "real" links, I wonder if Google down-rates the page-rank of sites that use this technique.
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